The Developmental Cup Set from Ezpz is a training set that teaches babies, toddlers and preschoolers to drink from an open cup and safely use a straw. The developmental Cup Set starts with the 2oz tiny cup for 4 months+, followed by the 4oz mini cup plus straw for 9 months+ and concluded with the Happy Cup plus straw for 2 years+. Each tool supports important milestones such as lip closure, lip rounding and tongue elevation. These drinking milestones promotes a safe swallow and healthy oral and speech development.